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Tuesday, June 29, 2010

LOPT - FLYBACK EHT TRANSFORMER COMPARATION TABLE ORIGINAL ---> HR DIEMEN SPARE PART LIST 15

LOPT - FLYBACK EHT TRANSFORMER COMPARATION TABLE ORIGINAL ---> HR DIEMEN SPARE PART LIST 15
Here below a list of the original Flybacks LOPTS of many CRT TVs.
 Comparison list is organized with original code to the  HR DIEMEN corresponding Replacement part.
 
 These DC flybacks are found in every CRT computer monitor and are called the DST flybacks (diode-split transformers) because of the several high voltage diodes and secondaries inside. In addition to the high resistance resistor cascade (Bleeder) and focus/screen tuning potentiometers described above, these kinds may have an integrated high voltage filtering capacitor (few nanofarads at >=30 kV), or – optionally – a HV capacitor for dynamic focus.

The TV  DC flybacks are also diode-split (DST), however these are found in every modern CRT TV-set from mid-end 80s and onwards. These have just two screen-tuning potentiometers and no internal capacitors whatsoever !
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Original Reference HR
F 0001 ME HR 6123
F 0001 PE HR 6123
F 0004 CE HR 6376
F 0004 ME HR 6376
F 0004 PE HR 6376
F 0004 PE-D HR 6376
F 0011 CE HR 6377
F 0011 ME HR 6377
F 0011 PE HR 6377
F 0011 PE-D HR 6377
F 0011 PE-M HR 6377
F 0015 CE HR 7626
F 0015 ME-H HR 7626
F 0015 PE HR 7626
F 0015 PE-M HR 7626
F 0027 CE HR 7675
F 0027 CE-M HR 7675
F 0027 CEM HR 7675
F 0027 PE HR 7675
F 0027 PE-M HR 7675
F 0027 PEM HR 7675
F 0036 CE HR 7635
F 0036 PE HR 7635
F 0036 PE-M HR 7635
F 0037 ME HR 8406
F 0037 MEZZ HR 8406
F 0045 PE HR 8816
F 0045 PE-M HR 8816
F 0063 CE HR 7809
F 0063 PE HR 7809
F 0063 PE-M HR 7809
F 0069 CE HR 7711
F 0069 PE HR 7711
F 0069 PE-H HR 7711
F 0069 PE-M HR 7711
F 0111 BM HR 19043
F 0115 PE HR 7626
F 013 WJ-H HR 8829
F 0148 PE-M HR 8544
F 0149 PE HR 8392
F 0149 PESA HR 8392
F 015 WJ-H HR 8810
F 0151 PE HR 8544
F 0151 PE-SA HR 8544
F 0156 PE-B HR 8544
F 0210 HR 3606
F 0210 A HR 3606
F 0213 PE HR 8803
F 0213 PE-B HR 8803
F 0220 A HR 3606
F 0227 HR 3607
F 0234 HR 3608
F 0574 BM HR 18017
F 0575 BM HR 15008
F 0576 BM HR 9830
F 1116 HR 6137
F 1117 HR 6137
F 1119 HR 7624
F 1143 HR 6143
F 1143 A HR 6267
F 1162 HR 6482
F 1166 HR 6166
F 1178 HR 7689
F 1180 HR 7733
F 1182 CE HR 6396
F 120 H 401 HR 7591
F 120 H 601 HR 7591
F 120 H 602 HR 7537
F 1204-1 HR 7474
F 1205 CE HR 6396
F 12104-1 HR 7474
F 12105-1 HR 7607
F 1215 CE HR 6123
F 1216 CE HR 6123
F 1216 CE-S HR 6123
F 1216 PE HR 6123
F 1220 CE HR 7050
F 1232 CE HR 6364
F 1247 CE HR 7348
F 1250 CE HR 6131
F 1251 CE HR 6363
F 1252 CE HR 6395
F 1257 CE HR 7348
F 1308 CE HR 6376
F 1308 CE-D HR 6376
F 1308 PE HR 6376
F 1366 CE HR 6610
F 1374 CE HR 6377
F 1374 CE-D HR 6377
F 1412 CE HR 7753
F 1412 CEN1 HR 7753
F 1414 CE HR 8050
F 1416 CE HR 7812
F 1417 CE HR 7847
F 1419 CE HR 7812
F 1442 CE HR 7756
F 1470 CE HR 7847
F 1470 CE-A HR 7847
F 1483 CE HR 7761
F 1484 CE HR 7756
F 1562 CE HR 6384
F 1563 CE HR 6266
F 1564 CE HR 6266
F 1581 CE HR 7846
F 1582 CE HR 7760
F 1605 CE HR 7760
F 1619 CE HR 7626
F 1619 CE-M HR 7626
F 1621 CE HR 7812
F 1625 CE HR 7790
F 1627 CE HR 7851
F 1628 CE HR 7851
F 1630 CE HR 7759
F 1643 CE HR 7807
F 1646 CE HR 7855
F 1651 CE HR 7861
F 1665 CE HR 7752
F 1687 CE HR 7773
F 1689 CE HR 7748
F 1691 CE HR 7763
F 1692 CE HR 6131
F 1693 CE HR 8310
F 1694 CE HR 8310
F 1703 CE HR 7864
F 171220 HR 8286
F 1717 CE HR 7758
F 1751 CE HR 7675
F 1754 CE HR 8815
F 1768 BM HR 6224
F 1768 CE HR 6224
F 1780 CE HR 7732
F 1783 BM HR 6167
F 1783 CE HR 6167
F 1786 BM HR 6223
F 1790 CE HR 7812
F 1802 CE HR 8141
F 1826 CE HR 8281
F 1838 CE HR 7756
F 1839 CE HR 8217
F 1840 CE HR 8227
F 1856 CE HR 7870
F 186 N HR 42012
F 1881 CE HR 8142
F 1890 CE HR 8142
F 1901 CE HR 8142
F 1923 CE HR 8143
F 1952 CE HR 8142
F 2000 BM HR 6256
F 2000 BM1 HR 6256
F 2000 CE HR 6256
F 2001 BM HR 6253
F 2002 BM HR 7521
F 2002 CE HR 7521
F 2003 BM HR 7531
F 2004 BM HR 7521
F 2004 BMZZ HR 7521
F 2005 BM HR 7531
F 2005 CE HR 8642
F 2006 BM HR 7531
F 2006 BMZZ HR 7531
F 2007 BM HR 7521
F 2008 BM HR 6475
F 2012 BM HR 7521
F 2015 BM HR 7497
F 2018 BM HR 7497
F 2019 BM HR 8570
F 2021 BM HR 7653
F 2022 BM HR 7558
F 2022 BMZZ HR 7558
F 2023 BM HR 7492
F 2023 BMZZ HR 7492
F 2023 CE HR 8286
F 2024 BM HR 7559
F 2024 BMZZ HR 7559
F 2025 BM HR 7497
F 2027 BM HR 7574
F 2028 BM HR 8753
F 2029 BM HR 7574
F 2030 BM HR 7653
F 2031 BM HR 7574
F 2032 BM HR 7256
F 2033 BM HR 7803
F 2034 BM HR 7663
F 2035 BM HR 7340
F 2036 BM HR 7595
F 2038 BM HR 7256
F 2039 BM HR 8022
F 2040 BM HR 7595
F 2041 BM HR 6497
F 2042 BM HR 7340
F 2045 BM HR 8617
F 2046 BM HR 8595
F 2047 BM HR 7345
F 2048 BM HR 8033
F 2049 BM HR 8032
F 2050 BM HR 6253
F 2052 BM HR 8437
F 2053 BM HR 8803
F 2053 CE HR 8803
F 2059 BM HR 8014
F 2065 BM HR 8013
F 2069 BM HR 8014
F 2070 BM HR 6613
F 2071 BM HR 6612
F 2072 BM HR 8191
F 2073 BM HR 8168
F 2074 BM HR 8181
F 2075 BM HR 6614
F 2076 BM HR 8202
F 2078 BM HR 6613
F 2082 BM HR 8229
F 2083 BM HR 8249
F 2087 BM HR 8384
F 2089 BM HR 8375
F 2092 BM HR 8385
F 2092 CE HR 8310
F 2092 CEZZ HR 8310
F 2199 CE HR 8310
F 5007 PA HR 8129
F 640 Z 731 HR 9537
F 650 H 401 HR 7063
F 650 H 701 HR 7063
F 650 H 701/31 HR 7063
F 660 H 701 HR 7063
F 740 H 401 HR 7016
F 760 H 401 HR 7016
F 760 H 701 HR 7016
F 760 H 702 HR 7016
F 860 H 401 HR 7065
F 860 H 401 A HR 7065
F 860 H 701 HR 7065
F 880 H 401 HR 7537
F 880 H 602 HR 7537
F 960 H 401 HR 7090
F 960 H 601 HR 7063
F 960 H 701 HR 6120
F 960 H 702 HR 6292
F 980 H 701 HR 6292
F 990 HR 8100
F 990 H 401 HR 6292
FA 01365 HR 46226
FA 014 WJ-H HR 8830
FA 015 WJ HR 8810
FA 1426 HR 7468
FA 2002 HR 7483
FA 2002 A HR 7483
FA 2002 B HR 7483
FA 2003 HR 7444
FA 2003 B HR 7483
FA 2014 HR 7736
FA 2017 HR 8303
FA 2019 HR 7468
FA 2019 P HR 7468
FA 2040 HR 7605
FA 2041 HR 7736
FA 2044 HR 7731
FA 2044 A HR 7731
FA 2044 E HR 7731
FA 2065 HR 8277
FA 2066 HR 46038
FAT 0048 HR 3602
FAT 0049 HR 3612
FAT 30201 HR 7468
FAT 900-1 HR 51/01
FAT 900-3 HR 51/01
FB 033 HR 8361
FB 033 A HR 8361
FB 033 AB 13 HR 8361
FB 033 AB 15 HR 8361
FB 033 AF 15 HR 8361
FB 059 HR 7183
FB 1 HR 2279 T18
FB 1047 HR 42092
FB 1053 HR 6215
FB 1053 A HR 6215
FB 1061 HR 46077
FB 1061 A HR 46077
FB 1143 HR 6143
FB 125 HR 7472
FB 132 HR 7472
FB 185 C HR 46013
FB 2023 HR 42028
FB 2030 HR 42030
FB 2058 HR 7651
FB 2059 HR 46044
FB 2059 A HR 46044
FB 2059 E HR 46044
FB 2063 HR 42069
FB 2068 HR 42077
FB 3005 HR 6382
FB 3056 HR 46023
FB 3064 HR 46023
FB 3082 HR 8781
FB 3084 HR 46026
FB 4 B HR 42080
FBA 507 HR 46093
FBM 002 HR 42057
FBM 003 HR 2290 T1
FBT 001 HR 7628
FBT 003 HR 42051
FBT 007 HR 46107
FBT 0189 HR 6241
FBT 042 M HR 46056
FBT 044042-000 HR 2287 T28
FBT 059 HR 7183
FBT 079 HR 6190
FBT 099 HR 6281
FBT 1053 HR 6215
FBT 1061 A HR 46077
FBT 14 N HR 8643
FBT 189 HR 6241
FBT 23 F 010 S 1 HR 7776
FBT 23 F 0101 S 1 HR 7776
FBT 23 F 101 S 1 HR 7776
FBT 240 HR 6281
FBT 2990 HR 8251
FBT 2990 A HR 8251
FBT 3380 HR 8296
FBT 402 HR 7149
FBT 412 HR 7150
FBT 520 HR 6221
FBT 7401 C HR 8313
FBT 820 HR 7148
FBT 970 HR 6222
FBTF 011 S 1 HR 7776
FC 1401 HR 7452
FC 1404 B HR 7728
FC 1406 HR 7460
FC 1426 HR 7455
FC 1426 P HR 7455
FC 1431 HR 7834
FC 1431 D HR 7834
FC 1432 HR 7742
FC 1434 HR 7729
FC 1439 HR 7462
FC 1445 HR 7608
FC 1452 HR 7472
FC 31 A 04 HR 8692
FCA 047 HR 7881
FCA 089 HR 8087
FCA 889 HR 8087
FCC 064 HR 8781
FCC 096 HR 8184
FCC 120 HR 8757
FCC 1415 AL HR 7254
FCC 1415 DL HR 7248
FCC 1415 GL HR 8083
FCC 1415 GN HR 8083
FCC 1415 IL HR 7254
FCC 1415 JL HR 7248
FCC 1415 OL HR 8082
FCC 1415 SL HR 7863
FCC 1415 XL HR 8090
FCC 1445 CL HR 7719
FCC 1514 AL HR 7254
FCC 2015 AL HR 7083
FCC 2015 BE HR 7188
FCC 2015 CE HR 7197
FCC 2015 DE HR 8045
FCC 2015 FL HR 7787
FCC 2015 GL HR 8085
FCC 2015 JL HR 7216
FCC 2015 LL HR 8081
FCC 2215 AE HR 7873
FCF 98020 A HR 7455
FCG 1445 CL HR 7719
FCG 1445 EL HR 7719
FCG 2011 L 03 HR 7938
FCG 2012 L 06 HR 7853
FCG 2045 AL HR 7938
FCG 2045 BL HR 7716
FCG 2045 CL HR 7716
FCG 2245 BL HR 7716
FCG 2245 CL HR 7716
FCK 09 A 002 HR 8501
FCK 09 A 002 (S) HR 8501
FCK 09 A 002 S HR 8501
FCK 14 A 006 HR 7998
FCK 14 A 009 HR 7728
FCK 14 A 009 D HR 7728
FCK 14 A 019 HR 7834
FCK 14 A 019 A HR 7834
FCK 14 A 022 HR 8805
FCK 14 A 028 HR 7737
FCK 14 A 028 A HR 7737
FCK 14 A 033 HR 7843
FCK 14 B 002 HR 7687
FCK 14 B 013 HR 8349
FCK 14 B 025 HR 7782
FCK 14 B 025 A HR 8823
FCK 14 B 040 HR 7791
FCK 14 B 045 HR 8766
FCK 14 B 045 A HR 8766
FCK 14 B 2 HR 7687
FCK 14 B 2 A HR 7687
FCK 1412 E 01 HR 46043
FCK 1412 E 07 HR 7728
FCK 1415 AL HR 7603
FCK 1415 EL HR 7603
FCK 1415 JL HR 7670
FCK 1421 E 01 HR 46043
FCK 1464 D HR 7728
FCK 1464 D 1 HR 7728
FCK 1464 D-1 HR 7728
FCK 1482 HR 7782
FCK 20 B 003 HR 7783
FCK 21 B 003 HR 8492
FCK 21 B 003 S HR 8492
FCM 1245 RL HR 42046
FCM 14 A 003 HR 46027
FCM 14 A 004 HR 7469
FCM 14 A 007 HR 8169
FCM 14 A 007 B HR 8169
FCM 14 A 025 HR 7794
FCM 14 A 032 HR 7998
FCM 14 A 033 HR 7843
FCM 14 B 007 HR 8169
FCM 14 B 007 A HR 8169
FCM 14 B 007 B HR 8169
FCM 14 B 007 BL HR 8169
FCM 14 B 009 HR 8087
FCM 1411 L 01 HR 7618
FCM 1415 AL HR 7469
FCM 1415 CL HR 7879
FCM 1812 E 01 HR 7731
FCM 20 A 001 HR 7738
FCM 20 A 005 HR 7477
FCM 20 A 010 HR 7738
FCM 20 A 015 HR 7471
FCM 20 A 016 HR 7443
FCM 20 A 021 HR 7731
FCM 20 A 023 HR 7617
FCM 20 A 025 HR 7795
FCM 20 A 029 HR 7999
FCM 20 B 003 HR 8094
FCM 20 B 007 HR 8773
FCM 20 B 010 HR 7612
FCM 20 B 021 HR 7840
FCM 20 B 022 HR 7432
FCM 20 B 025 HR 7830
FCM 20 B 027 HR 7438
FCM 20 B 031 HR 7473
FCM 20 B 031 A HR 7473
FCM 20 B 034 HR 7691
FCM 20 B 034 A HR 7691
FCM 20 B 042 HR 8668
FCM 20 B 043 HR 7779
FCM 20 B 057 HR 8564
FCM 2012 E 13 HR 7840
FCM 2012 E 16 HR 8138
FCM 2012 E 16 A HR 8138
FCM 2012 L 02 HR 7958
FCM 2014 FL HR 7616
FCM 2015 HR 7477
FCM 2015 AL HR 7477
FCM 2015 CL HR 7879
FCM 2015 HE HR 7929
FCM 2015 KE HR 7731
FCM 2015 KF HR 7466
FCM 2015 ML HR 7605
FCM 2015 MLP HR 7605
FCM 21 A 003 HR 7443
FCM 21 A 003 A HR 7443
FCM 21 A 004 HR 7491
FCO 14 A 002 HR 46033
FCO 14 A 002 A HR 46033
FCO 14 A 003 HR 46027
FCO 14 A 003 A HR 46027
FCO 14 A 003 L HR 46027
FCO 14 A 010 HR 46048
FCO 14 A 010 A HR 46048
FCO 14 A 017 HR 7708
FCO 14 A 019 HR 46027
FCO 14 A 028 HR 8248
FCO 14 A 030 HR 7708
FCO 14 A 030 C HR 7708
FCO 14 A 030 E HR 7708
FCO 14 A 031 HR 46072
FCO 14 A 037 HR 8219
FCO 14 A 042 HR 46089
FCO 14 A 042 C HR 46089
FCO 14 R 001 HR 7249
FCO 1412 E 03 HR 46006
FCO 1412 E 08 HR 7252
FCO 1412 E 10 HR 7255
FCO 1412 L 02 HR 8608
FCO 1414 E 08 HR 7252
FCO 2030 BE HR 7246
FCR 25 A 003 HR 7623
FCR 25 A 003 R HR 7623
FCR 25 A 005 HR 7680
FCR 25 A 005 R HR 7680
FCR 25 A 006 HR 7955
FCR 25 A 006 R HR 7955
FCR 25 A 007 HR 7959
FCR 25 A 007 R HR 7959
FCR 25 A 009 HR 8825
FCR 25 A 009 R HR 8825
FCR 25 A 013 HR 7992
FCR 25 A 013 R HR 7992
FCR 2615 AL HR 7677
FCR 28 A 002 HR 7610
FCR 29 A 001 HR 8506
FCR 29 A 002 HR 7987
FCR 29 A 006 HR 7982
FCR 29 A 006 A HR 7982
FCR 29 A 014 HR 7614
FCR 29 A 014 R HR 7614
FCS 230 A 1 HR 46001
FCV 1010 E 02 HR 7273
FCV 14 C 001 HR 7520
FCV 14 C 001 A HR 7520
FCV 14 C 003 HR 7560
FCV 1410 HR 8239
FCV 1410 E 03 HR 7127
FCV 1410 E 06 HR 8239
FCV 1410 E 07 HR 7336
FCV 1410 E 12 HR 7261
FCV 1410 E 12 A HR 7261
FCV 1410 E 18 HR 8057
FCV 1411 HR 8239
FCV 1411 E 06 HR 8239
FCV 1412 E 15 HR 8095
FCV 1412 E 15/2 HR 8095
FCV 1412 E 17 HR 7029
FCV 1422 E 03 HR 8080
FCV 1422 L 01 HR 7094
FCV 15 B 001 HR 46058
FCV 1510 E 01 HR 7264
FCV 1610 E 02 HR 8067
FCV 20 A 001 HR 7898
FCV 20 A 002 HR 7577
FCV 20 A 009 HR 7503
FCV 20 A 014 HR 7266
FCV 20 C 001 HR 7384
FCV 20 C 001 R HR 7384
FCV 20 C 002 HR 8545
FCV 20 C 002 P HR 8545
FCV 20 C 002 R HR 8545
FCV 20 C 002 RC HR 8545
FCV 2010 HR 7357
FCV 2010 E 02 HR 7357
FCV 2010 E 03 HR 8784
FCV 2010 E 04 HR 8092
FCV 2010 E 06 HR 7261
FCV 2010 E 07 HR 7535
FCV 2010 E 10 HR 8459
FCV 2011 HR 7357
FCV 2012 B 10 HR 7358
FCV 2012 E 10 HR 7358
FCV 2012 E 11 HR 7355
FCV 21 A 001 HR 8488
FCV 21 A 001 A HR 8488
FCV 21 A 002 HR 7128
FCV 21 A 006 HR 8206
FCV 21 A 006 R HR 8206
FCV 50 B 01 HR 7094
FCV 50 B 02 HR 7247
FCZ 29 A 002 HR 8854
FCZ 29 A 006 HR 8856
FCZ 29 A 006 A HR 8856
FCZ 29 A 006 A (S) HR 8856
FCZ 29 A 006 R HR 8856
FCZ 29 A 006 R (S) HR 8856
FCZ 29 A 014 HR 8678
FCZ 29 A 014 F HR 8678
FCZ 29 A 014 S HR 8678
FD 00 A 03 HR 42065
FD 0002 HR 7624
FD 0003 HR 7624
FD 0003 A HR 7624
FD 0039 HR 7875
FD 0067 HR 8611
FD 0094 HR 7874
FD 0113 HR 8364
FD 0125 HR 7713
FD 0125 A HR 7713
FD 0130 HR 7961
FD 0132 HR 7715
FD 0155 HR 7961
FD 0161 HR 7624
FD 0181 HR 8347
FD 0187 HR 7740
FD 0195 HR 8693
FD 0199 HR 7627
FD 02 A 51 HR 42062
FD 02 A 52 HR 42071
FD 0205 HR 7712
FD 0206 HR 8360
FD 03 HR 7624
FD 113 HR 8364
FD 125 HR 7713
FD 125 A HR 7713
FD 125 D HR 7713
FD 130 HR 7961
FD 132 HR 7715
FD 155 HR 7961
FD 161 HR 7624
FD 181 HR 8347
FD 187 HR 7740
FD 19061 HR 7217
FD 195 HR 8693
FD 199 HR 7627
FD 2 HR 7624
FD 205 HR 7712
FD 206 HR 8360
FD 206 AB HR 8360
FD 206 DC HR 8360
FD 3 HR 7624
FD 3 A HR 7624
FD 39 HR 7875
FD 67 HR 8611
FD 94 HR 7874
FDA 00 A 03 HR 42046
FDA 0001 HR 8528
FDA 001-117 A HR 42003
FDA 001-117 AA HR 42004
FDA 004-1230 HR 46001
FDA 004-1230-A HR 46001
FDA 006 HR 8458
FDA 006 N HR 8458
FDA 013 HR 7869
FDA 013 HC HR 7869
FDA 014 HR 7867
FDA 014 HC HR 7867
FDA 0148 C HR 7867
FDA 017 HR 42043
FDA 017-111 C HR 42043
FDA 019 HR 42012
FDA 019 B HR 42012
FDA 019 C HR 42013
FDA 019-1170 HR 42012
FDA 019-1170 B HR 42012
FDA 019-1170 C HR 42013
FDA 024 HR 42082
FDA 024-111 A HR 42082
FDA 06 HR 8458
FDA 06 N HR 8458
FDA 075 HR 42070
FDA 075-1320 HR 42070
FDA 075-1320 A HR 42070
FDA 087 HR 42051
FDA 087-303123-01 HR 42051
FDA 507 HR 46093
FDA 6 HR 8458
FDB 0003 HR 8365
FDB 01 HR 7712
FDB 03 HR 8365
FDB 05 HR 7712
FDB 1 HR 7712
FDB 3 HR 8365
FDB 5 HR 7712
FDC 014 HR 42028
FDC 014-111 A HR 42028
FDC 018 HR 42030
FDC 018-1110 HR 42030
FDC 039 HR 46044
FDC 056 HR 42069
FDC 056-111 A HR 42069
FDC 061 HR 42077
FDC 061-111 A HR 42077
FDC 063 HR 42076
FDC 063-1170 HR 42076
FDR 11 B 004 HR 42103
FDR 118-004 HR 42103
FE 2004 HR 8508
FE 2024 HR 7188
FE 7547 T HR 46166
FEA 004 HR 46001
FEA 004 A HR 46001
FEA 004-1230 HR 46001
FEA 004-1230-A HR 46001
FEA 013 HR 46002
FEA 013-1090 HR 46002
FEA 026 HR 46044
FEA 026-1350 HR 46044
FEA 027 HR 46196
FEA 033 HR 7692
FEA 039 HR 46043
FEA 039-1370 HR 46043
FEA 047 HR 46005
FEA 047 B HR 46005
FEA 047-1380 HR 46005
FEA 048 HR 46004
FEA 048-1410 HR 46004
FEA 056 HR 46017
FEA 056 A HR 46017
FEA 056-1370 HR 46017
FEA 059 HR 46024
FEA 059-1370 HR 46024
FEA 063 HR 7686
FEA 063 B HR 7686
FEA 065 HR 46056
FEA 065 A HR 46056
FEA 065-141 A HR 46056
FEA 065-141 AA HR 46056
FEA 066 HR 46061
FEA 071 HR 46089
FEA 075 HR 7628
FEA 077 HR 46003
FEA 077-1380 HR 46003
FEA 089 HR 7842
FEA 128 HR 46081
FEA 147 HR 46137
FEA 181 HR 7775
FEA 181 A HR 7775
FEA 185 HR 46089
FEA 185 A HR 46089
FEA 188 HR 7495
FEA 188-420025-01 HR 7495
FEA 207 HR 46196
FEA 210 HR 7658
FEA 210 A HR 7658
FEA 223 HR 7744
FEA 229 HR 46139
FEA 237 HR 7775
FEA 237 A HR 7775
FEA 241 HR 7664
FEA 258 HR 46088
FEA 261 HR 46166
FEA 284 HR 46143
FEA 287 HR 46122
FEA 288 HR 7744
FEA 306 HR 46088
FEA 306 A HR 46088
FEA 340 HR 46186
FEA 340 B HR 46186
FEA 364 HR 46189
FEA 374 HR 46099
FEA 374 C HR 46099
FEA 410 HR 7972
FEA 419 HR 46188
FEA 426 HR 46156
FEA 426-1510 HR 46156
FEA 448 HR 8189
FEA 452 HR 46005
FEA 454 HR 46160
FEA 469 HR 46230
FEA 477 HR 46222
FEA 480 HR 46115
FEA 488 HR 8189
FEA 502 HR 46167
FEA 503 HR 46132
FEA 507 HR 46093
FEA 515 HR 46124
FEA 540 HR 46220
FEA 540 A HR 46220
FEA 545 HR 46220
FEA 565 HR 46130
FEA 583 HR 46132
FEA 627 HR 46166
FEA 634 HR 7744
FEA 638 A HR 46167
FEA 641 HR 46133
FEA 645 HR 46123
FEA 653 HR 46184
FEA 658 HR 46231
FEA 662 HR 46155
FEA 663 HR 46161
FEA 663 A HR 46161
FEA 685 HR 46129
FEA 688 HR 46184
FEA 689 HR 46230
FEA 690 HR 46232
FEA 690 A HR 46232
FEA 708 HR 46121
FEA 718 HR 46188
FEA 751 HR 46207
FEA 753 HR 46117
FEA 755 HR 46117
FEA 780 HR 46221
FEA 780 B HR 46221
FEA 813 HR 46002
FEA 830 HR 46153
FEA 831 HR 46203
FEA 848 HR 46125
FEA 862 HR 46125
FEA 885 HR 46229
FEA 927 HR 7744
FEA 972 HR 46176
FEC 006 HR 46023
FEC 006-1150 HR 46023
FEC 009 HR 46026
FEC 009-1230 HR 46026
FEC 022 HR 46039
FEC 022-1230 HR 46039
FEC 033 HR 46090
FEC 033 A HR 46090
FFA 64012 L HR 8681
FFA 76014 D HR 46154
FFA 76014 L HR 46154
FFA 76014 U HR 46154
FFA 82012 H HR 46167
FFA 82025 H HR 46167
FFA 83012 D HR 7826
FFA 83013 D HR 7826
FFA 86012 A HR 46143
FFA 86012 D HR 46143
FFA 86012 D 1 HR 46143
FFA 86012 D 2 HR 46143
FFA 86012 H HR 46143
FFA 86012 L HR 46143
FFA 91001 M HR 7710
FFA 93012 L HR 8763
FFA 93016 L HR 8763
FFA 93021 L HR 7970
FFA 93034 L HR 8307
FFA 95001 D HR 46145
FFA 95001 H HR 46145
FFA 95002 D HR 46098
FFA 98001 D HR 46145
FFA 98001 H HR 46145
FFA 98001 M HR 46145
FGC 2045 BL HR 7716
FK 0164 HRT 505
FK 1009 HR 7728
FKD 14 A 001 HR 46117
FKD 15 A 001 HR 46117
FKD 15 B 002 HR 46199
FKD 15 D 002 HR 46192
FKG 15 A 001 HR 46117
FKG 15 A 006 HR 46153
FKH 17 A 001 HR 46179
FKI 17 A 001 HR 46168
FKI 17 A 002 HR 46169
FKY 17 A 001 HR 46168
FKY 17 A 002 HR 46169
FL 12104-1 HR 7474
FL 2700 HR 7708
FL 2705 HR 7252
FL 2713 HR 7255
FL 2727 HR 46089
FL 2732 HR 8369
FL 2732 A HR 8369
FL 2732 B HR 8369
FLB 505 HR 7939
FLB 505-425765 HR 7939
FM 0017 HR 8453
FM 0019 HR 6212
FM 0023 HR 8086
FM 0082 HR 2082
FM 0202 HR 1100
FM 0205 HR 2143
FM 0206 HR 1100
FM 0245 HR 2064
FM 0500 HR 5806
FM 0500 A HR 5806
FM 0500 B HR 5806
FM 0502 HR 5804
FM 0502 B HR 5804
FM 0503 HR 5807
FM 0503 A HR 5807
FM 0503 B HR 5807
FM 0504 HR 5805
FM 0504 C HR 5805
FM 0510 HR 5803
FM 0513 HR 5802
FM 0518 HR 5802
FM 0519 HR 5801
FM 0523 HR 5808
FM 0524 HR 5809
FM 0530 HR 5802
FM 0533 HR 5800
FM 0595 HR 46058
FM 0619 HR 46058
FM 0623 HR 46114
FM 0638 HR 46163
FM 17 HR 8453
FM 19 HR 6212
FM 202 HR 1100
FM 23 HR 8086
FM 245 HR 2064
FM 245 A 407 HR 2064
FM 2812 HR 7614
FM 500 A HR 5806
FM 500 B HR 5806
FM 502 HR 5804
FM 502 A HR 5804
FM 502 B HR 5804
FM 503 HR 5807
FM 503 A HR 5807
FM 504 HR 5805
FM 504 B HR 5805
FM 504 C HR 5805
FM 510 HR 5803
FM 513 HR 5802
FM 519 HR 5801
FM 530 HR 5802
FM 533 HR 5800
FMA 0002 HR 8402
FMA 01 HR 8689
FMC 1245 RL HR 42046
FMC 20 B 022 HR 7432
FMD 1235 AL HR 42037
FMD 1235 BL HR 42037
FMD 1245 DL HR 42046
FMD 1245 RL HR 42046
FMG 1235 BL HR 42017
FMG 1235 CL HR 42068
FMG 1235 FL HR 42018
FMG 1245 AL HR 42066
FMG 1435 CE HR 42067
FMH 1235 DE HR 2287 T32
FMH 1245 AL HR 42060
FMH 1245 IL HR 42071
FMH 1445 PL HR 2287 T21
FMMPC 11-2001 A HR 46127
FMMPC 11-2001 D HR 46148
FMMPC 11-2001 E HR 46127
FMMPC 11-2001 G HR 46135
FMMPC 11-2001 J HR 46148
FMMPC 21-2002 F HR 46191
FMMPC 51 M 1003 G HR 46176
FMMPC 51-1003 D HR 46148
FMMTC 61-1012 B HR 46159
FMMTC 61-1017 A HR 46187
FN 1047 HR 46167
FN 1407 HR 46167
FN 1419 HR 7695
FN 1419 A HR 7695
FN 1528 HR 46117
FN 1530 HR 46213
FN 1534 HR 46117
FQB 17 A 001 HR 46203
FQB 17 A 001 M HR 46203
FQI 20 B 001 HR 8765
FQI 21 B 002 HR 8820
FR 0027 HR 2272 R
FR 0029 HR 3615
FR 0057 HR 5126
FR 0066 HR 5126
FR 0075 HR 3615
FR 0082 HR 2082
FR 027 HR 2272 R
FR 029 HR 3615
FR 057 HR 5126
FS 230-009 HR 46001
FSA 14 A 003 HR 46091
FSA 15 A 002 HR 46183
FSA 15 A 003 HR 46183
FSA 15002 HR 46183
FSA 17013 M HR 7493
FSA 24006 S HR 7770
FSA 24007 L HR 8767
FSA 24007 M HR 8767
FSA 24008 S HR 7770
FSA 25002 HR 7725
FSA 25002 S HR 7725
FSA 25023 HR 8514
FSA 25023 S HR 8514
FSA 25027 S HR 7912
FSA 26012 M HR 7770
FSA 26013 M HR 7935
FSA 28013 M HR 7880
FSA 28014 M HR 8301
FSA 28023 M HR 7940
FSA 32014 HR 7522
FSA 32014 M HR 7522
FSA 36012 M HR 7880
FSA 36013 M HR 8480
FSA 37012 M HR 8480
FSA 38019 S HR 8491
FSA 38026 S HR 8491
FSA 39012 S HR 8300
FSA 42013 L HR 8681
FSJ 21 B 001 HR 8512
FSJ 21 C 001 HR 8185
FSM 25 A 001 HR 8679
FSM 27 A 001 HR 8511
FSM 28 A 001 HR 8210
FSN 14 A 015 HR 8189
FSN 14 A 024 HR 46124
FSN 14 A 028 HR 46171
FSN 14 A 028 N HR 46171
FSN 14 A 028 S HR 46171
FSN 14 A 029 HR 46123
FSN 14 A 029 F HR 46123
FSN 14 A 029 S HR 46123
FSN 14 B 027 HR 46125
FSN 14 B 027 N HR 46125
FSN 14028 M HR 46171
FSN 14028 N HR 46171
FSN 15 A 008 HR 46122
FSN 15 A 008 F HR 46122
FSN 15 A 008 S HR 46122
FSN 15 B 004 HR 46122
FSN 15 B 022 HR 46129
FSN 15 B 022 N HR 46129
FSN 15 B 032 HR 46215
FSN 15 B 032 N HR 46215
FSN 15 B 045 HR 46121
FSN 15 B 045 N HR 46121
FSR 28 A 005 HR 7386
FSR 28 A 005 S HR 7386
FST 1125 F 012/64 HR 6012
FST 1125 F 120/64 HR 6059
FST 1125 F 640/64 HR 6076
FST 1125-110 HR 6076
FSV 14 A 001 HR 8207
FSV 14 A 001 S HR 8207
FSV 14 A 004 HR 8491
FSV 14 A 004 H HR 8628
FSV 14 A 004 H (S) HR 8628
FSV 14 A 004 S HR 8491
FSV 14001 HR 8207
FSV 20 A 001 HR 7898
FSV 20 A 001 A HR 7898
FSV 20 A 001 D HR 7898
FSV 20 A 001 S HR 7898
FSV 20 B 001 HR 8481
FSV 20 B 001 A HR 8170
FSV 20 B 001 AS HR 8170
FSV 20 B 001 S HR 8170
FSV 20 B 013 HR 8438
FSV 20 B 018 HR 8769
FSV 20 B 018 C HR 8769
FSV 20 B 018 V HR 8769
FSV 20 C 012 HR 8545
FSV 20 C 012 A HR 8545
FSV 21 B 005 HR 8779
FSV 21 B 005 (S) HR 8779
FSV 21 B 005 A HR 8779
FSV 21 B 005 A (S) HR 8779
FSV 21 B 005 S HR 8779
FSW 17 A 002 HR 46216
FSY 17 A 001 HR 46152
FT 0002 HR 46154
FT 1004 B HR 42056
FTB 7401 C HR 8606
FTH 29 A 001 HR 7968
FTH 29 A 001 H HR 7968
FTH 29 A 001 S HR 7968
FTH 29 A 002 HR 7974
FTH 29 A 003 HR 8614
FTH 29 A 003 S HR 8614
FTH 29 A 013 HR 8494
FTH 29 A 013 A HR 8494
FTH 29 A 013 G HR 8494
FTH 29 A 013 S HR 8494
FTI 14 A 005 HR 7933
FTI 14 A 005 A HR 7933
FTK 14 A 004 HR 7852
FTK 14 A 004 P HR 7852
FTK 14 R 005 HR 8622
FTK 14 R 005 C HR 8622
FTK 14004 P HR 7852
FTK 20 R 002 HR 8093
FTK 20 R 004 HR 8616
FTK 20 R 004 C HR 8616
FTK 20 R 008 HR 8616
FTK 20 R 008 C HR 8616
FTK 21 B 003 HR 8776
FTK 21 B 003 A HR 8492
FTK 21 B 003 AS HR 8492
FTK 21 B 003 S HR 8776
FTMPC 11 T 6238 L HR 8164
FTMPC 31 T 6005 S HR 8811
FTMPN 51 T 6012 C HR 8853
FTMPN 51 T 6012 D HR 8838
FTMPN 51 T 6012 J HR 8645
FTMPNG 1-604 HR 8656
FTN 21 A 001 HR 7351
FTO 14 A 010 HR 46048
FTO 14 A 041 HR 7937
FTQ 14 A 003 HR 7786
FTQ 14 A 003 A HR 7786
FTQ 17 A 003 A HR 7786
FTR 29 A 002 HR 8214
FTR 29 A 003 HR 8393
FTS 14 A 003 HR 46085
FTS 14 A 003 D HR 46084
FTS 14 A 005 HR 46054
FTS 14 A 007 HR 46054
FTS 14 A 010 HR 46084
FTS 14 A 010 A HR 46084
FTS 14 A 013 HR 46053
FTS 14 A 013 A HR 46053
FTS 777 D HR 9365
FTSPN 11 E 8001 A HR 7896
FTSPN 13 T 8005 C HR 8300
FTSPN 13 T 8005 E HR 8123
FTX 14 A 005 HR 8247
FTX 14 A 013 HR 46183
FTX 14 A 015 HR 46089
FTZ 17 A 007 HR 46054
FTZ 17 A 007 AX HR 46054
FUA 17 A 010 HR 46221
FUH 29 A 001 HR 8212
FUH 29 A 001 B HR 8780
FUH 29 A 001 BS HR 8780
FUH 29 A 001 S HR 8212
FUH 29 A 002 HR 8764
FUH 29 A 002 S HR 8764
FUH 29 A 003 HR 8477
FUH 29 A 003 S HR 8477
FUH 29 A 004 HR 8379
FUH 29 A 004 S HR 8379
FUH 29 C 001 HR 8852
FUH 29 C 001 S HR 8852
FUH 34 A 001 HR 8585
FUH 34 A 001 B HR 8585
FUH 34 A 001 S HR 8585
FUJ 29 C 005 HR 8787
FUJ 29 C 005 F HR 8787
FUJ 29 C 007 HR 8844
FUJ 29 C 007 S HR 8844
FUR 3658 HR 46203
FUV 14 A 001 HR 7583
FUV 14 A 003 HR 7128
FUV 20 A 002 HR 7577
FUV 20 A 002 B HR 7577
FUV 20 A 006 HR 8036
FUV 20 A 006 A HR 8036
FUV 20 A 009 HR 7503
FUV 20 C 001 HR 8036
FUY 20 A 001 HR 7950
FUY 20 C 001 HR 8554
FUY 20 C 001 R HR 8554
FUY 20 C 011 HR 7656
FVC 2012 E 10 HR 7358
FWK 350 HRT 301
FXB 0012 HR 8440
F2-01 HR 2053


https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgt9B0fxpa8WBVysGThCVV9rcPScb8Z5WREiTbwjkZ9Z0DKfQ2WAhVapXyS8SZ5toZCIyik0YyDFSYKODl_FsEVXKu2aH8FHq61Hdzb3DRlpN2W_dyfw0xd88LY17ra_u-HNClApwkWC6B1/s1600/IMGH_10169__TVM.jpgLine transformers generate the necessary deflection pulse and other many key voltages and the  high voltage for anode of the picture tube in tube televisions and computer monitors. Usually this is around 30 kV for a color device, but the current is  with approx. 0.5 to 4 mA.

The line transformer or horizontal output transformer (English: flyback transformer or line output transformer) is part of a television / monitor with picture tube. It is used to supply the line deflection coil of the deflection system and at the same time usually also to generate the high voltage of 20 to 30 kV required for the operation of the picture tube and other voltages necessary for the operation of the device.

Line transformers work with the line frequency, with European TV sets with 15.625 kHz. Line transformers of 100 Hz televisions work at twice the frequency, i.e. at 31.25 kHz. In monitors, the line transformer is operated at different frequencies, which depend on the resolution of the image sent by the computer. For example, the line frequency of a monitor with a resolution of 1024 × 768 pixels and 85 Hz vertical frequency is approximately 68.7 kHz. With these frequencies, the line output stage switches a switching tube or today a switching transistor, which are used to control the line transformer.
The whistling noise of some older monitors and most older, conventional TV sets arises from the fact that mainly the line transformer, but also other components such as coils and capacitors, are mechanically excited to vibrate by the occurring magnetic and electrostatic forces. Whistling has a frequency of 15.625 kHz due to the European television standard. TVs with 100 Hz technology and most high-resolution computer monitors whistle outside the listening area........

Line transformers are potted with resin and have a ferrite core and are therefore of course only suitable for high frequencies in the kHz range. Newer types, so-called diode split transformers, contain many individual diodes between the windings and thus supply a rectified high voltage (pulsating DC voltage). Older models made of black and white devices have an external cascade, the direct (high-frequency) output voltage is then only about 8 kV, but a little more current is available with such AC line transformers. Line transformers require an electronic control circuit which provides a square wave signal in the range of approx. 15 kHz.

Diode split transformer with permanently cast diodes and DC output The advantage of line transformers: They are easy and inexpensive (or free) and can be obtained in large numbers at radio / TV shops and in computer shops where devices are disposed of. Especially nowadays, in which tube monitors have to make room for flat screens, many old monitors and TVs are disposed of.

Removal and wiring of a line transformer:

Important when removing the line transformer from the TV or monitor: First discharge the picture tube, then remove the high-voltage connection, and draw out the pin assignment of the line transformer before unsoldering. Two connections are particularly important: supply supply (approx. 150V from the power supply unit) and connection that goes to the collector of the horizontal output transistor or on very older types to a tube or thyristor final stage.


The thick, well-insulated, red cable is the high-voltage output (approx. 30kV), while the somewhat thinner, black cable carries the focus voltage, which is only around 6kV. Finally, the orange cable brings the grid 2 voltage, which is only a few hundred volts. Television and monitor flyback transformer pinout have some common designed except that the monitor
flyback have a internal capacitor built in. The internal capacitor value have around 2.7 nanofarad to 4.5 nanofarad to improve the picture quality especially when the monitor which can go for a higher resolution compare to Tv. If without the internal capacitor in the monitor flyback the display will curve or slightly out of shape especially at both the right and left hand side of the picture and may present other imperfections not admitted for monitors. It acts as a filter. Internally they may have a high vealue resitor (600 to 900 mega ohm) in parallel to HV output. This to adapt the ouput impedance of the LOPT to the CRT Anode.

Mostly tv and monitor flyback transformers have about ten pins at the bottom of the flyback. Each of the pin have a purpose or function as part of a complete circuit. The common pins that you can find in monitor flyback are: B+ pin, Horizontal collector pulse, ABL (automatic blanking limiter), GROUND, G1, AFC (automatic frequency control), VCC, HEATER (to filament) and X-RAY protection.

The B+ and horizontal collector pulse pin forms one winding which we call it as flyback primary winding. It can  only can be test by using a flyback meter such as the  Lopt tester flyback transformer pinoutor sencore LC102 and LC103C.


Note that some monitors and TV design may have a separate HV and deflections circuits

.
Normal meters can't check this kind of fault. This is the most important winding compares to others and it can easily developed a short circuit when B+ voltage line or Horizontal output transistor (HOT) shorted. Sometimes a shorted internal capacitor in the flyback transformer may cause the primary winding to burn internally and the flyback became bulge and poured out the epoxy.

Other pins are the ground, G1, and AFC winding. AFC stand for automatic frequency control and it send signal (pulse) from the flyback transformer to the horizontal oscillator ic to lock or synchronize the frequency of the monitor. If this AFC line fails the picture will shift either to the far left or far right. There is no way that you can adjust the picture to the center even with the internal adjustment in the mainboard. The purpose of G1 voltage is to pull the electron generated from the cathode (after the heater or filament heat up) and passed it to G2 which is the screen voltage.

G1 normally is a negative voltage or positive from few volts to 32 volts in some most ancient designs . Most tv picture tube do not use G1 voltage. If the G1 voltage is missing or zero voltage to the picture tube the monitor display will becomes very bright with retrace lines (diagonal lines or flyback lines) across the screen and sometimes the monitor will goes into shutdown mode.
ABL stand for automatic beam limiter- I refer it as a limiter further circuit. Why? because whenever there is a contrast or bright problem i will search for this pin and begin to trace from there. Normally a resistor increased in resistance and a shorted ceramic capacitor caused the display to become dim and you may think it might be the fault of a bad CRT.

Heater or filament pin nowadays hardly found in monitor flyback because the crt heater voltage now is derived directly from the switch mode power supply. However heater pin is still can be found in television flyback transformer. If the anode voltage is too high (more than 30 kilovolt), the x-ray protect pin will send a signal to horizontal oscillator ic in order to disable the horizontal drive waveform THIS FOR SAFETY REASONS.

Without the horizontal drive pulse the high voltage generated by the flyback will collapsed and protect the user from excessive x-ray.

The flyback transformer pinout will also generate high pulse ac which later convert to dc through an ultra fast recovery diode. For your information, the ac pulse generated by the flyback transformer cannot be check with our normal analog or digital meter. the frequency is so high and you need a special meter to do the job. The dc voltages are then supply to various circuit such as the vertical output circuit. If you  understand all the functions of each flyback transformer pinout, repairing  monitor or tv will be much easier and save your precious time.

 TV / MONITOR  Fly-Back Transformer Replacement GUIDE:


All repairers with  experience, once made a replacement of a driver transformer with more or less fortune. All we did was to methodize the work and modify the circuit to work optimally.

But....... when it comes to a fly-back Transformer , practically all repairers think that if the replacement is not the exact fly-back  Transformer, absolutely nothing can be done. In principle we would like to clarify that manufacturers of replacement fly-backs do not manufacture all fly-back Transformer variants; they only manufacture some of them and then connect the bases according to the different models and mark them with a different code. ANYWAY SPECIFICITY IS OEM RELATED BY DESIGN.

EXAMPLE:Between different 20" fly-backs Transformer , for example, there are usually minimal differences except in the position of the legs. If there are notable differences, it is in the high voltage because this varies according to the size of the screen. The 14" tubes usually have extra high tensions of 18 to 20 KV; the 20" tubes between 23 and 25 KV and finally the 29 and 33" tubes have tensions higher than 28 KV / 36KV. In addition, the larger tubes have a different horizontal output circuit that has an east/west modulator to correct the pad effect plus other specific parts.

Let's limit our analysis to 14 and 20" TVs from which the fly-back Transformer is not achieved. The first step is to know a fly-back inside to understand the replacement work. Let's analyze the returns and live of the auxiliary windings.
CHECK schematic diagram and study it.

A modern fly-back Transformer is a hybrid of a high and low voltage transformer and a screen voltage and focus adjustment circuit. It can be divided for analysis into a transformer and a focus pack.


NOTE:  fly-back Transformer IS SPECIFIC TO TV / MONITOR CHASSIS BY DESIGN, TAKE ALWAYS ORIGINAL OEM OR ORIGINAL MATCHED REPLACEMENTS.

Transformer analysis:


The transformer is fundamental part of the horizontal output circuit because it connects the source to the collector of the horizontal output transistor through an inductance about 4 times greater than that of the yoke. In this way, only 1.5 to 1.7 A of the 6 or 7 A peak-to-peak current through the yoke flows through the fly-back and the horizontal source capacitor. Be aware that in older tvs which may  have greater deflection systems the currents are higher.

But the fly-back is not an inductor, it is a transformer and part of the energy existing in its primary is transformed into several low voltage windings, which feed different stages of the TV such as the jungle, the vertical output, the video stage , the sound, key voltages for chroma, sync, and many others services depending on design, and above all the tube filament (which is not rectified but applied as AC). These windings are strongly coupled to the primary because they are built above or below it.

The geometry of the fly-back core is very particular because it is a transformer that has a high voltage winding and the turns of that winding must be away from the core. Therefore, the classic shape of the core with an "E" and "I" shape is abandoned and a shape with two "U"'s is used where the HV winding enters loosely. The spool of that winding has a slotted shape, where only the diameter of a wire enters. In this way the winding is really a wire spiral and in reality it is not one single winding but 4 or many more , each one with its corresponding high voltage diode and its filtering capacitor, also of high voltage. This winding, because of its shape, is loosely coupled to the primary so that a fault in it, is not transferred as a short circuit but as a reduction of primary inductance but it will produce a malfunction.

As we know, the return of the high voltage winding is not connected to ground, but to the horizontal source. A 20" tube supports only a maximum current for each cathode of 330 uA; between the three cathodes they can consume a maximum of 1 mA and that current is directed from the cathodes to the aluminizing of the screen that is part of the final anode of the tube. This current returns through the winding and produces a voltage drop in a network
Synthetically, if the image is black there is no current and the voltage of ABL  When the brightness increases, the voltage increases  so that when 1 mA circulates, the voltage   is cancelled and there operates the jungle / luminance matrix stages limiting the brightness and contrast.


Analysis of the focus / G2 VOLT pack inside  DST Transformer


Flyback deflection systems are well known and widely used in television receivers. In such systems, a deflection voltage source drives an autotransformer with a ramp shaped current for deflecting an electron beam across the phosphor coated faceplate of a cathode ray tube (CRT). At the end of the ramp waveform, a relatively large retrace pulse is developed. This pulse is magnified by the turns of the flyback transformer winding and rectified to develop the high DC voltage required to operate the CRT. As is well known, although the high voltage system is tuned, the high DC voltage produced varies substantially with system loading that occurs due to increases in the electron beam current of the CRT. There have been numerous circuits in the art for "stiffening" the high voltage supply. In many applications, a separate, non-deflection-based high voltage system is used because of its tighter tolerance on regulation.

With the growing use of computer monitors, the need for precision CRT displays has increased. In these uses, high voltage regulation is critical and needs to be closely controlled to prevent unacceptable raster distortion and size changes. On the other hand, the needs of the marketplace are such that the cost of the monitor must be maintained as low as possible.

The focus pack has several functions: it is a double variable voltage attenuator also known as HV Bleeder. The highest voltage is for the focus and the lowest for the screen. The older tubes are low focus and the focus pack delivers voltages of approximately 8 KV. The newer and bigger ones are high focus and deliver about 9.5 KV. It is not possible to change a low-focus fly-back for a high-focus one, because it does not adjust the focus.

Generally, the conventional bleeder resistor is manufactured in the following manner. , there is prepared a ceramic substrate  made of Al2 O3 having a purity of about 96%. Its thickness is about 0.5-1.2 mm, and its area is 400-1500 mm2. Upon the ceramic substrate , there is printed PbAg, PtAg, Ag or their combination paste. Then the printed substrate is baked at a temperature of about 800° C., and thus, a printed circuit board is formed, and then lead wires are soldered. Then RuO2 is printed thereupon, and then the structure is baked at a temperature of about 850° C. Thus a resistor having a certain thickness is completed.

Meanwhile, in this resistor, electric current can flow only if the electrical resistance per unit length of the resistor is smaller than the air contact electrical resistivity. In the case where the voltage breakdown resistivity of air is 0.5 KV/mm, if a voltage of 20 KV is supplied across a resistor 12, there has to be secured a distance of 20 KV÷0.5 KV/mm=40 mm. Further, if the thermal degradation and the environmental factors are taken into account, then the safe distance must be 1.8 times as large as the above distance, that is, 40 mm×1.8=72 mm. Meanwhile, in the case where the resistor 12 is printed on the ceramic substrate 10 in a straight line, the length of the ceramic substrate has to be longer, with the result that the total bulk of the ceramic substrate becomes too large.



The screen voltage is approximately the same for all tubes (in the order of 250 to 350V or 500 to 800V). Both voltages are provided by voltage dividers and high value potentiometers because they are directed to grids in the tube that do not consume current. As you can see, the circuit is simply a series of two high voltage potentiometers and two high voltage resistors connected between the pacifier output and ground. In figure above I draw the focus pack circuit only with the characteristic voltages and resistances, which are practically the same (or at least proportional) for all the equipment.


The resistance values are high enough that it is impossible to measure them with a digital or analog tester. It is even impossible to measure the voltages at the focus and screen outputs without altering their value. And they're prone to defects such rising in values or dropping value.

Now that we know the circuit let's start with the replacement work. As the fly-back has two sections we must analyze the failures of both sections separately starting with the fly-backs that have problems in the focus pack.

The most common fault is a dark screen despite the existence of high voltage. A high voltage tip should really be used for the tester if we want to be sure of the existence of the 25KV of AT but generally the test of measuring the screen voltage with the potentiometer at maximum is usually enough to verify that there is high voltage.

The ideal is to use the focus pack of a disused fly-back  Transformer set on a 20" TV that works well to indicate 250V on the screen output by adjusting the potentiometer. Without much error you can interpret that this test TV is 25 KV and already has a high voltage attenuator set that you must connect to the pacifier of the TV under test with an alligator clip that will be covered by the pacifier so that no arcs are produced.

If there is good high voltage and the screen is dark the problem may not be in the fly-back  Transformer. The most basic thing is to see if the tube filament is on and measure the screen voltage if you have not already measured it. If both things are OK, you should measure the focus voltage, with a high voltage tip that has a resistance greater than 200 MOhms.


The measurement with instruments is not dangerous for the circuit, because the focus source is of high impedance. 



At the time when indicated to connect the three cathodes to earth briefly  with resistors of 150KOhms and to return to test if the screen illuminates the problem is in the video card or the jungle.

But if the problem is in the focus pack you don't need to change the whole fly back. Transformer In specialized stores they sell focus packs ready to be connected to the pacifier that generate the focus and screen voltage. Cut the cables of the damaged focus pack, connect the new ones and test. You can also use a fly-back that has a damaged winding. This case is specific with external HT bleeders where the focus voltage is obtained from.


  If the problem is in the winding section of the fly-back Transformer  the first thing to do is to check the operation of the stage with the simulated fly-back instrument. Connect it replacing the primary and measure the collector oscillogram with low source voltage (for example 10% of the nominal value); if you do not have an oscilloscope, try it with the horizontal output detector (a RF detector probe) which can be lowered free of charge from and if the delay voltage has a normal value of about 80V, pass gradually to higher source values until the nominal value is reached.
    If everything is normal, try connecting only the primary of the fly-back Transformer supposedly damaged. This means that you must disconnect all the auxiliary diodes, including the HV pacifier, and try again, starting with a source voltage of 10% of the nominal value, until you reach 100%. If everything is OK, the problem is not in the fly-back Transformer but in some of the auxiliary circuits. Connect the auxiliary diodes one by one and always perform the same test starting from 10% of the source voltage until the damaged auxiliary circuit is discovered. Note: Although unlikely, consider that there may be more than one damaged auxiliary circuit. 

TAKE NOTE THAT THE'RE MAY A SPECIFIC PROTECTIVE TV CIRCUIT THAT WILL STOP THE HORIZONTAL OUTPUT IF IT IS NOT WORKING PROPERLY AND ALSO SOME  TV POWER SUPPLY VOLTAGE MAY NOT WORK PROPERLY IF THE HORIZONTAL OUTPUT IS NOT WORKING PROPERLY DUE TO A FLY-BACK TRANSFORMER WHICH MAY BE DEFECTIVE.

AS EXAMPLE:

In a typical switch mode power supply (SMPS) of a television receiver the AC mains supply voltage is coupled, for example, directly, and without using transformer coupling, to a bridge rectifier. An unregulated direct current (DC) input supply voltage is produced that is, for example, referenced to a common conductor, referred to as "hot" ground, and that is conductively isolated from the cold ground conductor. A pulse width modulator controls the duty cycle of a chopper transistor switch that applies the unregulated supply voltage across a primary winding of an isolating flyback transformer. A flyback voltage at a frequency that is determined by the modulator is developed at a secondary winding of the transformer and is rectified to produce a DC output supply voltage such as a voltage B+ that energizes a horizontal deflection circuit of the television receiver. The primary winding of the flyback transformer is, for example, conductively coupled to the hot ground conductor. The secondary winding of the flyback transformer and voltage B+ may be conductively isolated from the hot ground conductor by the hot-cold barrier formed by the transformer.

It may be desirable to synchronize the operation of the chopper transistor to horizontal scanning frequency for preventing the occurrence of an objectionable visual pattern in an image displayed in a display of the television receiver.

It may be further desirable to couple a horizontal synchronizing signal that is referenced to the cold ground to the pulse-width modulator that is referenced to the hot ground such that isolation is maintained.

A synchronized switch mode power supply, embodying an aspect of the invention, includes a transformer having first and second windings. A first switching arrangement is coupled to the first winding for generating a first switching current in the first winding to periodically energize the second winding. A source of a synchronizing input signal at a frequency that is related to a deflection frequency is provided. A second switching arrangement responsive to the input signal and coupled to the second winding periodically applies a low impedance across the energized second winding that by transformer action produces a substantial increase in the first switching current. A periodic first control signal is generated. The increase in the first switching current is sensed to synchronize the first control signal to the input signal. An output supply voltage is generated from an input supply voltage in accordance with the first control signal.


But if everything indicates that the problem is in the fly-back Transformer and the fly-back is not achieved, then we must find a fly-back Transformer as similar as possible (better original)  to ours and perform a very simple test. Make a 2 or 3 turns winding in any open place of the core by connecting one end of the winding to ground. If you have an oscilloscope, connect it over the added winding to raise the oscillogram; otherwise, connect the rewind pulse detector indicated above to a tip of the winding and then invert it to find both the positive and negative value of the signal. Connect only the primary of the new fly-back and run it at the nominal voltage.

 The oscillogram obtained will be similar to the one in figure: 



The oscillogram could appear inverted since we made our coil with any direction. If it appears inverted, change the ground connection to live. The most important thing is that you measure the peak pulse value of the signal, which in our case is 23.8V. If this voltage corresponds to three turns, calculate the value of voltage per turn as 23.8/3 = 7.9 V/turn.

If you don't have an oscilloscope, you can use the audio probe for the tester (A RF detector probe)  that will indicate directly the  value of the signal or make the double measurement with the delay detector.

Now we have to start modifying the auxiliary voltages of our substitute fly-back  Transformer if necessary. Let's start with the filament voltage. Observe the circuit of the substitute fly-back to find the ground leg and connect it to ground. Now measure the other auxiliary legs and note the peak to peak values. The filament should have a  peak pulse voltage of about 22 or 23 V. Do not try to measure the RMS voltage with a common tester or with the peak value probe. None of the classic instruments will show a peak pulse value of 6.3V. It is best to calculate the RMS value as a function of the peak-to-peak value for a delay time of 12 uS, which is what we did to indicate the correct peak value of 22.5V.

It is very likely that by changing the number of turns you will not be able to achieve the exact value. In that case you should calculate the excess turns and then adjust the resistor  value to get 22.5V on the filament. In our case you can test the voltage value of the filament winding and if it is close to the indicated one modify the value of resistor .

Is it very important that this voltage value is accurate? Yes, but a fluctuation of 1V cannot shorten the life of the tube but it's better avoided. The filament of a tube is far from the melting point, i.e. it is undervolted to increase the life to a value far above the cathode depletion but also better avoided.


Adjusting a Running Auxiliary Voltage

Let's suppose that the winding for the vertical voltage has to give 25V and gives 18. We measure that our fly-back has 7.9 V peaks per turn. For a delay time like the one indicated, the relationship between the positive semicircle and the peak value taken from the oscillogram in figure 30.4.3 is 3,07/23,8=0,13. This means that each turn adds a voltage of 3.67V to the rectified voltage and that to go from 18 to 25 you have to add approximately two turns (7.34V+18 = 25.34V). Without an oscilloscope, I have to add the two turns  and measure a voltage of 3.67/0.13= 28.2V with the peak probe. Now, I must cut the printed circuit and connect from the fly-back leg a wire that must pass twice inside the core and solder it to the cut track on the side of the diode.

Note: the direction of the winding is impossible to determine a priori, the most advisable thing to do is to choose any and measure if the voltage has the correct value. If not, the winding or connections must be reversed.

In this way all windings must be corrected, so that the fly-back is ready to perform a final test with everything connected.

But the auxiliary voltages are not all that differentiate one fly-back from another. In the next delivery we will explain how to perform the final test without burning anything in the attempt, and that should be changed if the width is not correct.


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